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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.239 21 Aug 2026

MCP tool telemetry marks servers the CLI owns

Under the hood

Useful1 Signal3

MCP

MCP telemetry now flags servers Claude Code owns itself versus ones you configured.

What

Two MCP tool-registration telemetry payloads now include a cliOwned flag next to the existing server name and icon fields, separating servers Claude Code itself owns from ones you configured. It is emitted conditionally, on a predicate not traced in this build.

Evidence

cliOwned

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.239 →